8 month old can’t get through night, can’t self soothe

my 8 month old son is struggling to sleep through the night. We do 2 naps a day, typically 1-1.5 hours each. Never longer than 2 hours. Usually wakes from second nap around 3-330pm and we put him to bed between 6-7 every night. He is eating some solid foods during the day and my wife breast feeds him